---
id: CVE-2026-92509
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/core: Fix potential use after free in counter_release()

  When accessing a counter via the netlink path the only synchronization
  mechanism for the said counter is r…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/core: Fix potential use after free in counter_release()

  When accessing a counter via the netlink path the only synchronization
  mechanism for the said counter is r…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    5eb0c57a8b568eb08f464861d84d518a2af939ac
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    d5cc211e8c39e46f357d30a092d683e84d560de9
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    8c013e3a8d8273da4d47bf1c27f016a3551996f5
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    64c72390d8407ea86de712a477c796b07d37abc4
  - >-
    Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac <
    235ef2d0e750885c29340b0fc40620a7a4f52e12
  - Linux 5.3
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:53.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92509'
references:
  - url: 'https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.779Z'
epss: 0.00173
epssPercentile: 0.05894
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: Fix potential use after free in counter_release()

When accessing a counter via the netlink path the only synchronization
mechanism for the said counter is rdma_restrack_get().
Currently, rdma_restrack_del() is invoked at the end of
counter_release(), which is too late, since by that point
vendor-specific resources associated with the counter might already be
freed. This can leave a short window where the counter remains
accessible through restrack, leading to a potential use-after-free.

Fix this by moving the rdma_restrack_del() call to be before the
freeing of the vendor-specific resources, ensuring that the counter is
removed from restrack before its internal resources are released.
This guarantees that no new users hold references to a counter that is
in the process of destruction.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.